preprocessor « include « C File Q&A

1. Should I use #include in headers?    stackoverflow.com

Is it necessary to #include some file, if inside a header (*.h), types defined in this file are used? For instance, if I use GLib and wish to use the gchar basic ...

2. C preprocessor in include header files    stackoverflow.com

I have a structure defined in a header file called data.h I am including data.h in myfile.c in the structure, I have part of the variables blocked off with

#ifndef TEST
 int x;
#endif

3. How to list all included header files by a c file (preferably in Vim)    stackoverflow.com

Is there a way to see all the header files included by a c file. Lets say a c file contians only one header file, but that header file
includes 10 ...

4. Preprocessor: tell if #include is used on file    forums.devshed.com

Hi everyone, I'm writing a small module in c, which is going to consist of "*.c" and "*.h" files. I would like to make them absolutely foolprof: the *.c file should not be allowed to be included into main source code, but will be included into the gcc compile command. Googling around for a second day it seems to me that ...